Tomohiro Kamitani (Katana Maidens: Toji no Miko episode animation director) is directing the anime at project No.9, and Aoi Akashiro (Katana Maidens: Mini Toji) is in charge of the series scripts.
Update: Crunchyroll reports the Katana Maidens – Tomoshibi anime is a Crunchyroll co-production.
The Toji no Miko: Kizamishi Issen no Tomoshibi smartphone game launched for iOS and Android devices in Japan in March 2018.
The official website for the original video anime of the Toji no Miko: Kizamishi Issen no Tomoshibi smartphone game posted the first teaser promotional video and a teaser visual on Saturday.